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Hydrotreatment of straw bio-oil from ablative fast pyrolysis to produce suitable refinery intermediates

Result description

To meet the expected requirements of the proposed EU Renewable Energy Directive for the next decade (RED II), it is necessary to increase the availability of second-generation biofuels. One promising way of doing this involves using ablative fast pyrolysis units to transform an agricultural by-product, for example straw, into bio-oil. To obtain straw bio-oil suitable for processing in a typical refinery, we optimized the key parameters of its hydrotreatment. For the upgrading, a continuous flow reactor with a fixed bed of a commercial sulphide NiMo/ Al2O3 catalyst was used. The reaction temperature and pressure were tested at 240–360 °C and 2–8 MPa, respectively. The reaction off-gas was analysed by GC-FID/TCD. A detailed physicochemical analysis of the products was carried out. Under most conditions tested, the product was separated into an aqueous and an organic phase. For the best products,>85% of the feed energy content remained in the organic phase and a significant decrease in viscosity and acidity was achieved. The product prepared at 360 °C and 8 MPa was the only one completely miscible with straight-run gas oil and, thus, appears to be the most suitable for co-processing in a refinery.

Keywords

Sulphided catalystsBiofuelsAblative fast pyrolysis (AFP)Straw bio-oilHydrotreatment

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    Hydrotreatment of straw bio-oil from ablative fast pyrolysis to produce suitable refinery intermediates

  • Original language description

    To meet the expected requirements of the proposed EU Renewable Energy Directive for the next decade (RED II), it is necessary to increase the availability of second-generation biofuels. One promising way of doing this involves using ablative fast pyrolysis units to transform an agricultural by-product, for example straw, into bio-oil. To obtain straw bio-oil suitable for processing in a typical refinery, we optimized the key parameters of its hydrotreatment. For the upgrading, a continuous flow reactor with a fixed bed of a commercial sulphide NiMo/ Al2O3 catalyst was used. The reaction temperature and pressure were tested at 240–360 °C and 2–8 MPa, respectively. The reaction off-gas was analysed by GC-FID/TCD. A detailed physicochemical analysis of the products was carried out. Under most conditions tested, the product was separated into an aqueous and an organic phase. For the best products,>85% of the feed energy content remained in the organic phase and a significant decrease in viscosity and acidity was achieved. The product prepared at 360 °C and 8 MPa was the only one completely miscible with straight-run gas oil and, thus, appears to be the most suitable for co-processing in a refinery.

  • Czech name

  • Czech description

Classification

  • Type

    Jimp - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20704 - Energy and fuels

Result continuities

  • Project

  • Continuities

    R - Projekt Ramcoveho programu EK

Others

  • Publication year

    2019

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Fuel

  • ISSN

    0016-2361

  • e-ISSN

  • Volume of the periodical

    238

  • Issue of the periodical within the volume

    15 February 2019

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    13

  • Pages from-to

    98-110

  • UT code for WoS article

    000450319700012

  • EID of the result in the Scopus database

    2-s2.0-85055254409

Basic information

Result type

Jimp - Article in a specialist periodical, which is included in the Web of Science database

Jimp

OECD FORD

Energy and fuels

Year of implementation

2019